Pulling leg? One might be used to stick on board (7,3)
I believe the answer is:
drawing pin
'one might be used to stick on board' is the definition.
(you might pin something to a board)
'pulling leg?' is the wordplay.
'pulling' becomes 'drawing' ('draw' can be a synonym of 'pull').
'leg?' becomes 'pin' (pin is a kind of leg).
'drawing'+'pin'='DRAWING-PIN'
(Other definitions for drawing pin that I've seen before include "Thumb tack" , "there is a point to it" , "can be used to secure sheet on board" , "Paper fastener" , "Poster-securing device?" .)